So were your power reading lower than expected as well? Maybe just take whatever the results were and set your zones, do your structured workouts based on those zones and see if the harder workouts feel too easy.

For an FTP test I don’t think your cadence is too low, but it’s definitely too low for track racing. If you have access to a velodrome year round and that’s where the majority of your training is going to be i would probably just structure workouts based on speed and cadence, especially if it’s an indoor velo where you don’t have to worry about wind, temp, and all those other annoying variables. You probably don’t even need the power data if that’s the case.